1317669978975 has 96 divisors (see below), whose sum is σ = 2622364538880. Its totient is φ = 570321440640.

The previous prime is 1317669978953. The next prime is 1317669978979. The reversal of 1317669978975 is 5798799667131.

It is not a de Polignac number, because 1317669978975 - 2¹¹ = 1317669976927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1317669978975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317669978979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17148592 + ... + 17225258.

It is an arithmetic number, because the mean of its divisors is an integer number (27316297280).

Almost surely, 2^{1317669978975} is an apocalyptic number.

1317669978975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1317669978975 is a deficient number, since it is larger than the sum of its proper divisors (1304694559905).

1317669978975 is a wasteful number, since it uses less digits than its factorization.

1317669978975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78429 (or 78424 counting only the distinct ones).

The product of its digits is 1080203040, while the sum is 78.

The spelling of 1317669978975 in words is "one trillion, three hundred seventeen billion, six hundred sixty-nine million, nine hundred seventy-eight thousand, nine hundred seventy-five".